Sienna Miller is full of surprises—and what better way to debut a new pregnancy and hairstyle than on the red carpet?
At the 2025 Fashion Awards in London on December 1, Miller wore a sheer white Givenchy gown that gave her baby bump the spotlight—and confirmed that she’s expecting her third child with boyfriend Oli Green. And while her happy news commanded most of the attention, her new hairstyle is definitely contributing to her glow. Miller wore her waist-length hair in ethereal boho waves that looked straight out of a Renaissance painting.
While nearly every blonde (speaking from experience) has brought reference photos of Sienna Miller’s signature honey color and perfectly blown-out locks to the salon, this look is a departure from her typical styles. She’s known for glossy, cascading layers and long beach waves, but her most recent look is less uniform. Her crimped waves are full of tousled texture. And paired with a darker root and middle part, the final look is textbook just-bathed-in-a-stream boho chic. Better yet, it’s super easy to recreate, and an ideal undone-on-purpose styling option.
While we still love our impossibly voluminous blowouts, lower-maintenance haircuts have been trending for winter. From the resurgence of low-lift mermaid waves to trending crops like the grown-out pixie Tinkerbell cut, styles that feel intentional yet effortless are gaining popularity for every length.
Miller’s “fairy princess waves,” as British Vogue dubbed them, are especially romantic on extra-long hair. But anyone who can manage a few braids can easily get the look. To try it for yourself, let your hair air-dry almost completely before bed (and don’t forget to use a hair oil to lock in moisture and protection). Before you go to sleep, add two to four loose braids to your hair to create a crimped wavy texture. Don’t worry about keeping things tidy—different-size sections and nonuniform areas will help you emulate Miller’s natural final look.
In the morning, take out your braids, hit your hair with some dry texture spray or a sea salt mist, and loosely brush out your waves. With minimal fussing, you’ll have a new shortcut to “I woke up like this” hair for 2026.
Grace McCarty is the associate beauty editor at Glamour.